CN201194196Y

CN201194196Y - Electric power control circuit

Info

Publication number: CN201194196Y
Application number: CNU200820111739XU
Authority: CN
Inventors: 马阳春
Original assignee: Hefei Royalstar Laundry Equipment Manufacturing Co Ltd
Current assignee: Hefei Midea Laundry Appliance Co Ltd
Priority date: 2008-05-14
Filing date: 2008-05-14
Publication date: 2009-02-11
Anticipated expiration: 2018-05-14

Abstract

A power supply control circuit is characterized in that, a normally open soft touch K is arranged in series in a primary winding of a power transformer T and on a power supply phase conductor N; a relay control circuit composed of a diodetriode Q and a relay coil J in an collector of the diodetriode Q is arranged in an output base line P30, and a normally open contact of the relay is arranged on two ends of the soft touch K in parallel. In the utility model, a primary winding power of the power transformer is completed cut off in a state of shut down when keeping the power plug accessed, thereby cutting off the power of the complete machine, realizing wattless stand by, prolonging service life of the device.

Description

Power control circuit

Technical field

The utility model relates to power control circuit, a kind of can be used in washing machine or the dryer of more specifically saying so, the power control circuit of control master control system power-off.

Background technology

As shown in Figure 1, at present, the common problem that exists of current supply circuit that generally is used for washing machine and drier is as long as attaching plug N, L remain connection, even if under off-mode, power transformer is in "on" position always, stabilized voltage power supply in the Circuits System still is the power supply of master control computer plate, and master control computer plate does not cut off the power supply, and this form has shortened the useful life of master control computer plate greatly.

The utility model content

The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of power control circuit is provided, so that when keeping attaching plug to insert, the following thoroughly elementary winding power supply of power cutoff transformer of off-mode, thereby cut off the complete machine power supply, realize no power consumption standby, prolong the useful life of device.

The utility model technical solution problem adopts following technical scheme:

Design feature of the present utility model be in the elementary winding of power transformer T, be positioned on the power supply phase line series connection be provided with often open touch button K, in one road output line of master control chip, be provided with by triode Q and be arranged on the control relay circuit that the relay coil J in the collector electrode of triode Q constitutes, be arranged in parallel at the two ends of touching button K with the normally opened contact of described relay.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

The utility model touches button startup work; After the program of finishing the work, under the state that the maintenance attaching plug inserts, the primary of cutting off the electricity supply winding power supply, thus making the complete machine outage, it is simple in structure, easy to use, the minimizing electric energy is economized the useful life of consuming, effectively prolonging device.

Description of drawings

Fig. 1 is the prior art structural representation.

Fig. 2 is the utility model structural representation.

Below by embodiment, the utility model is described in further detail in conjunction with the accompanying drawings.

Embodiment:

Referring to Fig. 2, in the elementary winding of power transformer T, be positioned on the power supply phase line N, series connection be provided with often open touch button K, in one road output line P30 of master control chip, be provided with by triode Q and be arranged on the control relay circuit that the relay coil J in the collector electrode of triode Q constitutes, be arranged in parallel at the two ends of touching button K with the normally opened contact of relay.

Under the off-mode, touch-switch K and relay normally open contact j are open mode, the elementary winding open circuit of power transformer T, and the complete machine power supply is thoroughly turn-offed;

When coming into operation, press and touch button K, power transformer T gets, main control chip gets electric, and immediately, the output line P30 of main control chip is high level output, triode Q conducting, relay coil J gets electric, and its normally opened contact is connected, thereby the complete machine current supply circuit is kept, finish up to whole working procedure, the P30 output line of main control chip transfers to be low level that triode Q ends, relay coil J dead electricity, its normally opened contact cut-offs, the complete machine power supply is cut off, and realizes no power consumption standby, promotes the useful life of computer plate greatly.

Claims

1. power control circuit, it is characterized in that in the elementary winding of power transformer T, be positioned on the power supply phase line N series connection be provided with often open touch button K, in one road output line P30 of master control chip, be provided with by triode Q and be arranged on the control relay circuit that the relay coil J in the collector electrode of triode Q constitutes, be arranged in parallel at the two ends of touching button K with the normally opened contact of described relay.